Calvin's Eucharist and Local Presence

Although the the Articles of Religion do not directly reference Calvin, their use of Augustine in Article 22 is nearly a direct quote from Calvin’s Institutes 4.17.34, [Battles Vol. 2, 1404]. Unfortunately this seems to represent a rather selective use of Augustine. While it is true that Augustine writes, “he who received the power of the Sacrament, not only the visible Sacrament; and indeed inwardly, not outwardly; and who eats with the heart, not who presses with the teeth” (Tractates on the Gospel of John, Tractate 26.12), Calvin is highly selective when he uses Augustine to support his doctrine. Elsewhere, Augustine is able to make the following affirmations that seem to affirm a local presence:

That bread which you see on the altar, having been sanctified by the word of God is the Body of Christ (corpus est Christi). That chalice, or rather, what is in that chalice, having been sanctified by the word of God, is the Blood of Christ (sanguis est Christi). Through that bread and wine the Lord Christ willed to commend his Body and Blood, which he poured out for us unto the forgiveness of sins. (Sermones 227, PL 38)

Christ was carried in his own hands [Ferebatur enim Christus in manibus suis] when, referring to his own Body, he said, 'This is my Body.’ For he carried that body in his hands [Ferebat enim illud corpus in manibus suis]. (Enarrationes in Psalmos 33:1, 10, PL 36).

None of this is new, of course, but I'm starting to lose confidence with regard to Calvin's rejection of the local presence and in his treatment of the manducatio impiorum. I could use some help if anyone wants to set me straight.